US2218512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for dislodging surface materials
Assignee: Individual
•
Filing: 1938-12-15
•
Granted: 1940-10-22
•
Expires: 1958-12-15
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:52
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815; E02F3/8155; E01; E01H; E01H5/00; E01H5/04; E01H5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-10-22 | 1944-04-22 | 1944-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-22 | 1948-04-22 | 1948-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-22 | 1952-04-22 | 1952-10-22 | $7700.00 | Window Closed / Lapsed |